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With the 470EX-AI off-camera, as a wireless E-TTL receiver unit, angle its flash head manually to any available angle you desire — straight at a subject, up at the ceiling, backwards inside an umbrella or softbox, and so on ... P.Fn 04 — AF- assist beam method ... This Personal Function controls which type of focus- assist beam will be used, when it’s mounted directly on an EOS camera, and One-Shot AF is active on the camera.
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